Hi guys, Have a '78 II, with a 302- mild crane cam, forged rods, hyperuectic pistons, weiand intake, headers, and a holley 600 vac sec carb roughly 210hp to the wheels-with a c4 trans. Currently have an 8" rear end with 3.00:1 gears. Looking to change the gear ratio out to a 3.80 or a 4.11:1...